Monthly Archives: June 2020

It seems that I’m invariably lucky enough to meet fantastic girls😁. These days, I’ve been occasionally meeting an incredibly adorable girl in Banan Library, with a distance of about 50m to which I rented a small room for study & preparing my summer internship. It all began with one of my library friends, a ♀, […]

There’re a couple of YouTube videos that illustrate the history & principles of elevators. History Part Principle Part And the follow-up is a very impressive animation made by UC Berkeley. Elevator Brake Systems